# std::sortable

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< cpp‎ | iterator

Defined in header `<iterator>` |  |
template< class I, class Comp = ranges::less, class Proj = std::identity > concept sortable = std::permutable<I> && std::indirect_strict_weak_order<Comp, std::projected<I, Proj>>; |  | (since C++20)

The `sortable` concept specifies the requirements for algorithms that permute a range into an ordered range according to `Comp`.

### Semantic requirements

std::sortable<I, Comp, Proj> is modeled only if all concepts it subsumes are modeled.

### See also

ranges::sort (C++20) | sorts a range into ascending order (algorithm function object)
ranges::stable_sort (C++20) | sorts a range of elements while preserving order between equal elements (algorithm function object)
ranges::partial_sort (C++20) | sorts the first N elements of a range (algorithm function object)
ranges::nth_element (C++20) | partially sorts the given range making sure that it is partitioned by the given element (algorithm function object)
ranges::inplace_merge (C++20) | merges two ordered ranges in-place (algorithm function object)
ranges::push_heap (C++20) | adds an element to a max heap (algorithm function object)
ranges::pop_heap (C++20) | removes the largest element from a max heap (algorithm function object)
ranges::make_heap (C++20) | creates a max heap out of a range of elements (algorithm function object)
ranges::sort_heap (C++20) | turns a max heap into a range of elements sorted in ascending order (algorithm function object)
ranges::next_permutation (C++20) | generates the next greater lexicographic permutation of a range of elements (algorithm function object)
ranges::prev_permutation (C++20) | generates the next smaller lexicographic permutation of a range of elements (algorithm function object)

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